Siri debuted in 2011 as one of the first intelligent personal assistants. Since then, personal assistants have become an integral part of the smartphone experience, providing a way to more efficiently interact with the hand-held device. They can perform simple tasks like taking notes and setting reminders. While this doesn’t seem like much in 2016, these features were ground-breaking a mere five years ago. Today, Facebook uses facial recognition that makes tagging friends easier, while Netflix and Spotify use learning algorithms to suggest your next favorite movie.